<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>表单</title>
</head>
<body>
    <h2>单选框</h2>
    性别：
    <input type="radio" name="gender" checked> 男
    <input type="radio" name="gender" > 女

    <h2>标签增大点击范围一</h2>
    <input type="radio" id="man">
    <label for="man">男</label>

    <h2>标签增大点击范围二</h2>
    <label><input type="radio" name="gender2">男</label>
    <label><input type="radio" name="gender2" checked>女</label>
</body>
</html>